Dynasylan A - Description

Dynasylan A is the ethyl ester of orthosilicic acid.


Dynasylan A

More information about Dynasylan A

Dynasylan A is a colourless, low-viscosity liquid with SiO2 content of 28.5%. Use requires acid- or alkali-catalysed hydrolysis. Since all 4 ethoxy groups are able to participate in this reaction, Dynasylan A is regarded as tetrafunctional. Hydrolysis leads to silanol groups which, in a subsequent condensation reaction, form very stable siloxane bonds (-Si-O-Si-). Condensation starts before hydrolysis is complete. During storage of these hydrolysates condensation, continues until a gel is formed. The rate of gelation depends on the concentration of water. 



In the Evonik literature it is frequently also referred to under the name TEOS (tetraethoxysilane).


How can we support you with Dynasylan A?

I am looking for..